Improvement in knife-sharpeners



A. GROSS.

Knife-Sharpeners.

Patented Sept. 22, 1874,

UNITED STATES PATENT QFFIGE.

ALBERT GROSS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN KNlFE-SHARPENERS.

Specification forming part of Letters Patent No. 155,153, dated September 22, 1874; application filed July 27, 1874.

To all whom it may concern:

Be it known that I, ALBERT GRoss, of the city and county of Philadelphia, and the State of Pennsylvania, have invented a new and useful Improvement in Sharpeners for Knives, &c.; and I do hereby declare the following to be a clear and exact description of the nature thereof, sufficient to enable others skilled in the art to which my invention appertains to fully understand, make, and use the same, reference being had to the accompanying draw ings, making part of this specification, in which- Figure 1 is a side view of the device embodying my invention. Fig. 2 is a top view thereof. Fig. 3 is an end view thereof.

Similar letters of reference indicate corresponding parts in the several figures.

My invention consists in two blades, which, jointed to a proper handle, have their edges or faces held relatively to each other by the action of a spring, and are limited in their opening movements by a stop, whereby an article of cutlery may be properly and conveniently sharpened, and provision made for the wear of the blades.

Referring to the drawings, A represents a block or handle, by which the device is to be grasped and held. B represents the sharpener, consisting of two blades, (1 b, which cross each other and are jointed together centrally, the axis thereof having its bearings on an arm, 0, projecting laterally from the handle Between one end of each blade and the handle A there is arranged a spring, D, which forces out said end, the outward motion thereof being limited by a stop, E, which engages with the end of the blade, but does not interfere with the motion of the blade toward the handle A.

It will be seen that, when the edge of a knife or other article is worked against the two blades at the point 0, where they cross each other, the sharpening operation is performed. As the cutting-edges wear away and the knife comes in contact with the portions of the edges that remain sharp, the two blades open sufiiciently to permit the knife to reach such portions; but the springs D keep said blades sufficiently together on their work, so that the knife is properly sharpened on both sides. It will also be seen that there are two points, 0, for sharpening purposes, and that always one of the points will present itself to the operator. It will furthermore be seen that each spring D serves a twofold purpose of forcing out the end of the blade to which it is connected and forcing in the opposite end of said blade.

When the cutting-edges of the blades are dull or worn out the blades may be removed, resharpened, and reapplied, and the operation will be the same as that stated.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is I The blades to 1), spring D, and stop E, combined and operating substantially as and for the purpose set forth.

ALBERT GROSS.

Witnesses:

JOHN A. WIEDERSHEIM, ALBERT H. HoEoKLEY. 

